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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: VaadinUtil.html 689 2013-06-28 19:22:16Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.vaadin;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>/**<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Miscellaneous utility methods.<a name="line.11"></a>
<span class="sourceLineNo">012</span> */<a name="line.12"></a>
<span class="sourceLineNo">013</span>public final class VaadinUtil {<a name="line.13"></a>
<span class="sourceLineNo">014</span><a name="line.14"></a>
<span class="sourceLineNo">015</span>    private VaadinUtil() {<a name="line.15"></a>
<span class="sourceLineNo">016</span>    }<a name="line.16"></a>
<span class="sourceLineNo">017</span><a name="line.17"></a>
<span class="sourceLineNo">018</span>    /**<a name="line.18"></a>
<span class="sourceLineNo">019</span>     * Verify that we are running in the context of the given {@link ContextApplication} and that it is locked.<a name="line.19"></a>
<span class="sourceLineNo">020</span>     * This method can be used by any code that manipulates Vaadin state to assert that the proper Vaadin<a name="line.20"></a>
<span class="sourceLineNo">021</span>     * locking has been performed.<a name="line.21"></a>
<span class="sourceLineNo">022</span>     *<a name="line.22"></a>
<span class="sourceLineNo">023</span>     * @param application the {@link ContextApplication} we are supposed to be running with<a name="line.23"></a>
<span class="sourceLineNo">024</span>     * @throws IllegalArgumentException if {@code application} is null<a name="line.24"></a>
<span class="sourceLineNo">025</span>     * @throws IllegalStateException if there is no {@link ContextApplication} associated with the current thread<a name="line.25"></a>
<span class="sourceLineNo">026</span>     * @throws IllegalStateException if the {@link ContextApplication} associated with the current thread is not {@code application}<a name="line.26"></a>
<span class="sourceLineNo">027</span>     * @throws IllegalStateException if the {@link ContextApplication} associated with the current thread is not locked<a name="line.27"></a>
<span class="sourceLineNo">028</span>     */<a name="line.28"></a>
<span class="sourceLineNo">029</span>    public static void assertApplication(ContextApplication application) {<a name="line.29"></a>
<span class="sourceLineNo">030</span>        if (application == null)<a name="line.30"></a>
<span class="sourceLineNo">031</span>            throw new IllegalArgumentException("null application");<a name="line.31"></a>
<span class="sourceLineNo">032</span>        final ContextApplication currentApplication = ContextApplication.currentApplication();<a name="line.32"></a>
<span class="sourceLineNo">033</span>        if (currentApplication == null)<a name="line.33"></a>
<span class="sourceLineNo">034</span>            throw new IllegalStateException("there is no ContextApplication associated with the current thread");<a name="line.34"></a>
<span class="sourceLineNo">035</span>        if (currentApplication != application) {<a name="line.35"></a>
<span class="sourceLineNo">036</span>            throw new IllegalStateException("the ContextApplication associated with the current thread " + currentApplication<a name="line.36"></a>
<span class="sourceLineNo">037</span>              + " is not the same application as the given one " + application);<a name="line.37"></a>
<span class="sourceLineNo">038</span>        }<a name="line.38"></a>
<span class="sourceLineNo">039</span>        if (!Thread.holdsLock(application)) {<a name="line.39"></a>
<span class="sourceLineNo">040</span>            throw new IllegalStateException("the ContextApplication associated with the current thread " + currentApplication<a name="line.40"></a>
<span class="sourceLineNo">041</span>              + " is not locked by this thread");<a name="line.41"></a>
<span class="sourceLineNo">042</span>        }<a name="line.42"></a>
<span class="sourceLineNo">043</span>    }<a name="line.43"></a>
<span class="sourceLineNo">044</span>}<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>




























































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